[Bug 90943] New: connecting dell UP3214Q to mac book pro hangs computer

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=90943

            Bug ID: 90943
           Summary: connecting dell UP3214Q to mac book pro hangs computer
           Product: DRI
           Version: unspecified
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: DRM/Intel
          Assignee: intel-gfx-bugs at lists.freedesktop.org
          Reporter: ken at kenjo.org
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
                CC: intel-gfx-bugs at lists.freedesktop.org

Created attachment 116446
  --> https://bugs.freedesktop.org/attachment.cgi?id=116446&action=edit
oops.

Connecting the display over mini displayport (thunderbolt connector) hangs the
laptop.

when doing this while displaying the desktop I get nothing computer just dies
no logs no nothing, it just freezes.

If I switch to console mode before connecting the cable I get the attached
output from the kernel.

kernel version is 

Linux retina 4.0.5-040005-generic #201506061639 SMP Sat Jun 6 16:40:45 UTC 2015
x86_64 x86_64 x86_64 GNU/Linux

os is ubuntu 15.04

I tried with the thunderbolt module loaded or unloaded same result.

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